Magazine-boiler.



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No. 851,030. PATENTED APR. 23, 1907.

Y A'. B. RECK.

MAGAZINE BOILBR.

APPLICATION FILED JULY 26, 1906.

4 SHEETS-SHEET 1.

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s Illflll Wl Tft/[S555 a LOM MWM J No. 851,030. PATENTED APR. 23, 1907.A. B. BECK.

MAGAZINE BOILER.

APPLIOATION FILED JULY 2a, 190s.

4 SHEETS-SHEET n.

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/A/ vE/v Toi? W/ r/VESSES No. 851,030. PATENTED APR. 23, 1907.

A. B. REGK.

MAGAZINE BOILER.

APPLIATIGN FILED JULY 26, 1906.

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W/ T/VESSES /Mww 4 SHEETS-'SHEET 3.

PATENTED APR. 23, 1907.

A. B. REK.

MAGAZINE BOILER.

APPLIGATION FILED JULY 26. 1906.

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WITNESSES V/MWW/ mz Noam: pzrzns ca., wasmucrun, o. c.

same boiler.

UNITED STATES PATENT FFIOE.

MAGAZINE-BOILER.

Specification of Letters Patent.

Patented April 23, 1907.

Application iiled July 26,1906. Serial No. 327,839.

.To all whom it may concern:

Be it known that I, ANDERS BoRcH Raon, captain, a citizen of Denmark,residing at Christiansvej 16, Hellerup, Denmark, have invented new andusefullmprovements in Furnaces for Magazine-Boilers, of which thefollowing is a specification.

The object of my invention is to provide means for maintaining inboilers with a magazine for fuel a constant combustion with a highefficiency without the accumulation of the incombustible part ofthe fueldiminishing the rate of combustion during the periods where the boileris left alone Without being attended to. The accompanying drawings showexamples of application of my invention to dierent kind of boilers.

Figure 1 is a longitudinal vertical section through a sectionalcast-iron boiler, being especially adapted for `non-bituminous coal orcoke. Fig. 2 is a horizontal section of the Fig. 3 is a longitudinalvertical section through the fore part of a. cast-iron sectional boilerespecially adapted for bituminous coal. Fig. 4 is a horizontal sectionthrough the boiler shown in Fig. 3. Fig. 5 is a longitudinal vverticalsection through a steel or Wrought-iron boiler especially adapted tobituminous coal and with the grate inside the boiler. Fig. 6 is ahorizontal section through the same boiler. Fig. 7 is a longitudinalvertical section through a steel or wrought-iron boiler also adapted forbituminous coal, but with the grate outside the boiler, connectionsbeing provided for the circulation of the water from the boiler throughthe water-chambers inclosing the grate and the pipes e and c, whichconnect said watcnchambers with each other. Fig. 8 is a horizontalsection through the same boiler.

In all iigures the parts that serve to the same purposes are designatedby the same letters.

It will now be seen that in all :figures the grate of the boiler isshown divided in two f parts, an upper part that is vertical and a lowerpart that is sloping down against the d support of the grate in order tokeep a uniform thickness of the layer of fuel on the grate and in orderto allow the ashes formed by the combustion to be pushed to the hindpart of the grate by the fresh fuel sinking down from the magazine g,such ashes collecting in the hind part of the ash-pit that is open tothe combustion-chamber. r

The upper vertical part of the grate is in all forms of the boilersshown formed of horizontal tubes c, said tubes being connected with thehollow side walls of the furnace in such a manner that the water of theboiler can circulate through the tubes.

The lower sloping part of the grate is in all forms of the boilers shownformed of ordinary grate-bars d, resting on tubes e, wherein the waterfrom the boiler circulates in the same manner as in the tubes c. Thegrate-barsd are protected against being too hot partly by cont tact withthe tubes e and partly by radiation .to the side walls of the furnace,the Water of the boiler circulating through said side walls and tubes,as explained above. In the boilers shown in the Figs. l-6 the grate-barsd radiate heat even to the bottom of the ashpit, said bottom beinghollow and its interior space being filled with water and communi eatingwith or forming part of the boiler.

ln the cast-iron sectional boilers shown in Figs. 1, 2, 3, and 4 astrong circulation of Water can be produced through the horizontal tubesc and e, through which the waterspaces of the two side walls of thefurnace communicate with each other. To attain this end, the frontsection of the boiler is divided by a vertical partition f, (shown inFig. 2,) one side of said front section communieating with the sectionof the boiler next to it near its bottom, the other side of the frontsection being connected to the next' section near its top. When thewater is heated in one side of the front section of the boiler by theaction of the re, the result will be that such water will rise and passthrough the top connection to the next section of the boiler, and freshwater will be drawn from the bottom of the said next section of theboiler to the other side of the front section and from there through thetubes c and e. It will be seen that in this manner the front section isreally divided by the vertical partition into two separatewater-chambers, connected to each other only through the pipes c. and e.A similar strong circulation through the tubes c and e can be producedin the boiler shown in Figs. 7 and 8. Here the furnace of the boiler isinclcsed on its sides by two water-chambers connected by the tubes c ande. bers communicates with the boiler at its hottom only and the other atits top only. Thus One of the said water-chamiQo f the heating of thewater in the l. water-cham- I 1o ing the place of the consumed fuel andpushing (by its weight) the incornbustible part of the fuel (ashes andclinkers) down along the sloping grate to the hind part of the ash-pit,that is o en to the combustion-chamber h.

It wil be seen that the hind part of the ash-pit is large enough to holda considerable quantity of ashes, and consequently these boilers can berun many hours before the ashes will collect to such an extent that theair-spaces between the slanting grate-bars will e clogged up, and eventhen combustion can go on, the air-spaces between the tubes c of thevertical part of the grate iving sufficient access to the air. It willfurt er be seen that since the hindmost of the two pipes e, that sup ortthe slanting grate-bars, is a tube cooled by the Water of the boiler noharm can be done to the said pipe even in case the attendant whenclearing the ash-pit for ashes takes out so much that some burningfuelcomes down below the pipe.

t will be seen that in all forms of boilers shown in the figures thefuel-ma azine is quite open to the combustion-cham er h, no water-cooledsurfaces separating the fuelmagazine from the combustion-,chamber andpreventing the products of the combustion rom attaining such a hightemperature that is the most effective for a good combustion of thegases in the combustion-chamber. Further, it will be seen that in allforms of boilers shown in the figures an air-channel 1' is covering thewhole front of the boiler. The object of this channel 'r is that the airdestined to pass to the fuel through the grate (the primary air) may beheated to as high a temperature as possible. The air passes into the4upper part of the channel r, where the entrance of the air is marked byarrows and is led down to the ash-pit, a plate 1 formin the inner wallof the lower part of the air-c annel, the front door 7c of the boilerforming the outer wall. While the air passes through channel r it takesup heat that else would e radiated and lost from the front ofthe boiler,whereas now the heating of the air before it goes through the ratecontributes a great eal to a good com ustion in the furnace of theboiler.

If the boilers, as the three boilers shown in the Figs. 3 8, aredestined for bituminous coal, the combustion in the combustionchamber his improved by introduction into said chamberof highly-'heated airdirect from outside (secondary air.)

In Fig. 4 will be seen air-channels 0 for the secondary air rising alongthe inner walls of the water-chambers that lnclose the furnace. Theseair-channels o have openings to the outside air through the outer wallsof the water-chambers and unite in a horizontal channel o over thecombustion-chamber h, as shown in Fig. 3. The vertical parts of theair-channel o are closed to the furnace side by fire-bricks ',u, (seeFig. 4,) and the horizontal part of the channel is se arated from thecombustion-chamber by a arge block of firebrick q, that will be highlyheated by the gases burnin T in the combustion-chamber. As shown in 4ig.3 and Fig. 4, said block of fire-brick g is perforated with holes,through which the secondary air finds its way from the channel o to thecombustion-chamber. Similar air-channels 0` and blocks of firebrick gare shown in Figs. 6 and 7 and serve for the same purpose as describedfor Fig. 3 and Fig. 4-viz., to give access for highlyheated air directinto the combustion-chamber when bituminous coal is to be used for theboilers.

Having thus described my invention, what Iclaim as new, and desire tosecure by Letters Patent, is-

1. In a boiler for steam or water the combination of a fuel-magazine, agrate divided into an upper vertical part and a lower sloping partsituated below the fuel-magazine and a combustion-chamber withwatercooled walls open as well against the fuelmagazine as against theash-pit behind the sloping part of the grate.

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2. In a boiler for steam or water the combination of a fuel-magazine, agrate divided into an upper vertical part and a lower sloping partsituated below the fuel-magazine, a combustion chamber with water cooledwalls open as well against the fuel-magazine as against the ash-pitbehind the sloping part of the grate and an air-channel with access forthe outside air, said channel covering the front of the boiler andopening into the ashp 3. In a boiler for steam or water the combinationof a fuel-magazine, a grate divided into an upper vertical part and alower sloping part situated below the fuel-magazine, a combustionchamber with water cooled walls open as well against the fuel-magazineas against the ash-pit behind the sloping part of the rate, and anair-channel opening into the sald combustion-chamber through afire-brick lining over said chamber.

4. In a boiler for steam or water the combination of a fuel-magazine, agrate divided into an upper vertical part and a lower sloping partsituated below the fuel-magazine, a combustion chamber with water cooledwalls open as well against the fuel-magazine as against the ash-pitbehind the sloping part of the grate, and horizontal pipes between s'aidwater-cooled chambers, said IIO ISO

pipes forming the vertical part of the rate and the supports of thesloping part o the grate, and said water-cooled chambers being connectedto the boiler one at its bottom and the other at its top.

5. In a boiler for steam or water the combination of a fuel-magazine, agrate divided into an upper vertical part and a lower sloping partsituated below the fuel-ma azine and sloping down against a horizontapipe supporting the back end of the grate and having its ends insertedinto the inner walls two subscribing witnesses.

ANDERS BORCI-I RECK. Witnesses:

JOHANNES NEILsEN, T. J ENsEN.

